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Java > Open Source Codes > cowsultants > itracker > ejb > client > resources > MessageFormat


1 /*
2  * This software was designed and created by Jason Carroll.
3  * Copyright (c) 2002, 2003, 2004 Jason Carroll.
4  * The author can be reached at jcarroll@cowsultants.com
5  * ITracker website: http://www.cowsultants.com
6  * ITracker forums: http://www.cowsultants.com/phpBB/index.php
7  *
8  * This program is free software; you can redistribute it and/or modify
9  * it only under the terms of the GNU General Public License as published by
10  * the Free Software Foundation; either version 2 of the License, or
11  * (at your option) any later version.
12  *
13  * This program is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16  * GNU General Public License for more details.
17  */
18
19 package cowsultants.itracker.ejb.client.resources;
20
21 import java.text.DecimalFormat JavaDoc;
22 import java.text.NumberFormat JavaDoc;
23 import java.util.Locale JavaDoc;
24
25 import cowsultants.itracker.ejb.client.util.Logger;
26
27 import org.apache.oro.text.regex.*;
28
29 /**
30   * This class provides support for message replacement when there is a need for more than
31   * 10 arguements. Currently the only additional formatting it accepts are number patterns.
32   */
33 public class MessageFormat {
34     private static final Perl5Matcher matcher = new Perl5Matcher();
35     private static final PatternCompiler compiler = new Perl5Compiler();
36     private static Pattern pattern;
37
38     static {
39         try {
40             pattern = compiler.compile("{(\\d+),?([\\w]*),?(.*?)}", Perl5Compiler.CASE_INSENSITIVE_MASK|Perl5Compiler.SINGLELINE_MASK);
41         } catch(MalformedPatternException mpe) {
42             Logger.logError("Invalid pattern specified. No formatting will be performed.", mpe);
43             pattern = null;
44         }
45     }
46
47     public static String JavaDoc format(String JavaDoc message, Object JavaDoc[] options) {
48         return format(message, options, ITrackerResources.getLocale());
49     }
50
51     public static String JavaDoc format(String JavaDoc message, Object JavaDoc[] options, Locale JavaDoc locale) {
52         String JavaDoc output = message;
53
54         if(pattern != null) {
55             int currentOffset = 0;
56             StringBuffer JavaDoc buffer = new StringBuffer JavaDoc();
57             PatternMatcherInput input = new PatternMatcherInput(message);
58
59             while(matcher.contains(input, pattern)) {
60                 MatchResult result = null;
61                 try {
62                     result = matcher.getMatch();
63                     int numGroups = result.groups();
64                     int optionNumber = Integer.parseInt(result.group(1));
65
66                     buffer.append(message.substring(currentOffset, result.beginOffset(0)));
67                     currentOffset = result.endOffset(0);
68
69                     if(options != null && optionNumber < options.length && options[optionNumber] != null) {
70                         if(numGroups > 2 && "number".equalsIgnoreCase(result.group(2))) {
71                             // Format the option value as a number
72 try {
73                                 NumberFormat JavaDoc formatter = NumberFormat.getInstance(locale);
74                                 if(numGroups > 3) {
75                                     formatter = new DecimalFormat JavaDoc(result.group(3));
76                                 }
77                                 buffer.append(formatter.format(Double.parseDouble(options[optionNumber].toString())));
78                             } catch(Exception JavaDoc e) {
79                                 Logger.logDebug("Unable to format " + options[optionNumber] + " as number.", e);
80                                 buffer.append(options[optionNumber].toString());
81                             }
82                         } else {
83                             buffer.append(options[optionNumber].toString());
84                         }
85                     }
86                 } catch(Exception JavaDoc e) {
87                     Logger.logError("Unable to perform option replacement for option " + (result == null ? "NULL" : result.group(1)));
88                     Logger.logDebug("Invalid option has current offest of " + currentOffset + " in message '" + message + "'", e);
89                 }
90             }
91
92             if(buffer.length() > 0) {
93                 buffer.append(message.substring(currentOffset));
94                 output = buffer.toString();
95             }
96         }
97
98         return output;
99     }
100
101 }
102
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